Finding the Fourth Proportional to 1,386.03, 1,911.56 and 1,090.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.03 : 1,911.56 = 1,090.83 : x
2. Step 2: Convert to fraction form
   1,386.03/1,911.56 = 1,090.83/x
3. Step 3: Cross multiply
   1,386.03x = 1,911.56 × 1,090.83
4. Step 4: Simplify right side
   1,386.03x = 2,085,181.54
5. Step 5: Solve for x
   x = 2,085,181.54/1,386.03
6. Step 6: Final answer
   x = 1,504.43